System information

200 Logical Partitions on System i5
You will need to signon to DST with the appropriate service tools user ID and password, as
shown in Figure 6-28.
Figure 6-28 Posting DST to partition console
6.5.3 Performing main storage dumps
A main storage dump (MSD) is the contents of main storage, that is, system memory or RAM,
from a single moment in time. Main storage dumps can either be initiated automatically by the
partition in response to a severe Licensed Internal Code error, or manually by the user. In
order to manually initiate a main storage dump, the partition needs to be in manual mode.
Manually, a main storage dump is initiated as follows:
1. If the partition is not in manual mode, change the mode to manual. See 6.3.1, “Changing
IPL side and mode” on page 191 for additional information.
2. Bring up the reboot dialog for the partition (6.3.3, “Restarting a running partition” on
page 193) and select Dump and then click OK.
Retry MSD IPL
During MSD processing there is a special short IPL before the MSD can be viewed or copied
to either disk or media. This IPL is called the MSD IPL. In the event of an error, this IPL can
be retried without losing the contents of main storage that have not yet been saved for
diagnostic purposes.
The retry MSD IPL is initiated as follows:
1. If the partition is not in manual mode, change the mode to manual. See 6.3.1, “Changing
IPL side and mode” on page 191 for additional information.
2. Bring up the reboot dialog for the partition (6.3.3, “Restarting a running partition” on
page 193) and select Dump Retry and then click OK.
6.5.4 Working with remote service
The remote service support communications line is used is used by Operations Console (see
Figure 6-29). Support tools like RSSF (Remote Service and Support Facility) can also use
this line. From the HMC GUI, this line can be activated or deactivated.
Attention: Perform a main storage dump under the direction of your next level of support.
Incorrect use of this service tool can result in unnecessary down time and loss of debug
information.